Lots of paper
Refs added but need sorting out, and other things have broken
Fixed a few bugs
Tidied up references a bit
Minor corrections (typos, etc.)
Figure 2 width changed to make labels more visible
Reworded DEM explanation
Improved description of reason for reusing synthetic emission
Rearranged DEM-finding explanation for better flow
Minor clarifications
Plot of response functions added
More clarification
Clarification of goodness-of-fit
Plots of model comparisons added and a few instances of 'emission measure' removed
Typos, etc.
Inverse problem clarification
Preprocessing clarification
Slightly more inverse problem explanation
Justification for fixing width and height of DEM
Put capitals on figure and section references